mirror of
https://github.com/X0nk/Bliss-Shader.git
synced 2025-01-03 16:13:30 +08:00
79 lines
2.2 KiB
GLSL
79 lines
2.2 KiB
GLSL
#version 120
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//Horizontal bilateral blur for volumetric fog + Forward rendered objects + Draw volumetric fog
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#extension GL_EXT_gpu_shader4 : enable
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varying vec2 texcoord;
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flat varying vec3 zMults;
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uniform sampler2D depthtex0;
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uniform sampler2D colortex3;
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uniform sampler2D colortex2;
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uniform sampler2D colortex0;
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uniform int frameCounter;
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uniform float far;
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uniform float near;
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uniform int isEyeInWater;
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uniform vec2 texelSize;
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float ld(float depth) {
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return 1.0 / (zMults.y - depth * zMults.z); // (-depth * (far - near)) = (2.0 * near)/ld - far - near
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}
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vec4 BilateralUpscale(sampler2D tex, sampler2D depth,vec2 coord,float frDepth){
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vec4 vl = vec4(0.0);
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float sum = 0.0;
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mat3x3 weights;
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ivec2 posD = ivec2(coord/2.0)*2;
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ivec2 posVl = ivec2(coord/2.0);
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float dz = zMults.x;
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ivec2 pos = (ivec2(gl_FragCoord.xy+frameCounter) % 3 );
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//pos = ivec2(1,-1);
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ivec2 tcDepth = posD + ivec2(-2,-2) + pos*2;
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float dsample = ld(texelFetch2D(depth,tcDepth,0).r);
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float w = abs(dsample-frDepth) < dz ? 1.0 : 1e-5;
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vl += texelFetch2D(tex,posVl+ivec2(-1)+pos,0)*w;
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sum += w;
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tcDepth = posD + ivec2(-2,0) + pos*2;
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dsample = ld(texelFetch2D(depth,tcDepth,0).r);
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w = abs(dsample-frDepth) < dz ? 1.0 : 1e-5;
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vl += texelFetch2D(tex,posVl+ivec2(-1,0)+pos,0)*w;
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sum += w;
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tcDepth = posD + ivec2(0) + pos*2;
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dsample = ld(texelFetch2D(depth,tcDepth,0).r);
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w = abs(dsample-frDepth) < dz ? 1.0 : 1e-5;
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vl += texelFetch2D(tex,posVl+ivec2(0)+pos,0)*w;
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sum += w;
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tcDepth = posD + ivec2(0,-2) + pos*2;
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dsample = ld(texelFetch2D(depth,tcDepth,0).r);
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w = abs(dsample-frDepth) < dz ? 1.0 : 1e-5;
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vl += texelFetch2D(tex,posVl+ivec2(0,-1)+pos,0)*w;
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sum += w;
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return vl/sum;
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}
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void main() {
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/* DRAWBUFFERS:0 */
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//3x3 bilateral upscale from half resolution
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float frDepth = ld(texture2D(depthtex0,texcoord).x);
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vec4 vl = BilateralUpscale(colortex0,depthtex0,gl_FragCoord.xy,frDepth);
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vec3 color = texture2D(colortex3,texcoord).rgb;
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vec4 transparencies = texture2D(colortex2,texcoord);
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color = color*(1.0-transparencies.a)+transparencies.rgb*10.;
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color *= vl.a;
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color += vl.rgb;
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gl_FragData[0].rgb = clamp(color,6.11*1e-5,65000.0);
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gl_FragData[0].a = vl.a;
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}
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